Safety valve for tires



May 20, 1930. A. R. MILES SAFETY VALVE FOR TIRES Filed Sept. 1, 1926INVENTOR WITNESSES aged/1%.

ATTORNEYS.

" tions on'the lines33andrespectively,

" 4 having a passage therethrough. for entrance Patented Ma 20,1939

" P f 0F F it ALnEn'r nnvimonnl vrrnns, or mmml mu mm var vii ron TumsApplication filed Se tember sr'i i ir rlals pea 1 My invention relatestoa safety valve/for j tires, and particularly to a device of theclassdescribed whereby the inflationmay befproduced to any "predeterminedpressurewith' in the limits of thewgauge,"andupon reaching thepredetermined pressure which the gauge is set for an audible signal willbe given and further inflation prevented, thus avoiding the danger ofover-inflation; s'

provide a device of the indicated class ime proved in variousparticulars whereby to promote accuracy andreliability in-the use of thedevice, as well as simplicity of construction I 115 and convenienceofadjustment and opera- ,tion. V

I V The natureof my inventiongandjits dis:

tinguishing features and v .advantages will clearly appear as thedescription proceeds.

a Reference is'to be had to the,accompanying drawings forming a part ofthis specification,;it being understood that thedrawings aremerelyillustrative of one' example of the invention.

- I .Figure 1 is a longitudinal section of a safe-;v

ty valve for'tires embodying myinvention;

Figure 2 is a plan View with parts partly brokenaway and insectiony I f2 Figures 3 and 4 are transverse vertical secof Figure 1. i v s I Figure5 is a perspective'view of-thesup- 7 porting device for the' h I .v p

' In carrying out my invention in accordance with the illustratedexample a tubular body or casing 10 is provided havinga head 11 on a thefront end thereon-said head having a nipple 12'to receive a chuck orhose as in the 7 .case of a tire valve and thehead and nipple of airtothe tire valve or the like. f

The air passage has a check 'valve 13 rockable on the support .14 havinga 'V-shap'ed l1'1g150n which thevalve rests at one edge, 5, said supportalso having, a-lateral member 16 to engage the head 11 on aside of theair passage;- Athreaded stem 18"e 1g'agesthehead I ll 'and' has aconical endl9 lfitting a corre sponding bore ina plug 17 tovhold'head 11permanently to the body 10. In the head 11 Thegeneral object of myinvention is to V referredfto, those numerals at the sides of line 36being in practiceadded to that nu-Q meral on the body 10with'which said'line36 andasecond ring through I V which the air passes. A'latch'22 isprovided 7 passing through the' ring "21 to prevent "it;

"from? turning and to discourage tampering, V with the device; Saidlatch 22has a lug 23 in the camslotll7 in plugl7, so 'thatthe partial'turningof biodyfllO andwith it lZ' will advance orvretract latch 22.

latch has 'a'threaded'end to engage the threads of thetire valve toholdthe device firmly in position; I I p r V The hollow body '10 or casinhas an inter: nalithread'24, and atubular shell 25 extending into-thebody 10 has a thread member 26 engaging ,the thread 24." The stem18on-65.

conical member19'has'a through bore for the. f release. of air, saidvthrough bore" being con trolled by'thevalve28jin a'cup 29 haviiig fga;V l I 1 stem"-3.0 advantageouslyformed 'witharadial, 7 a velongatedzwingsf Spring 31is'coiledabout1 stem 30v and bears at one endagainst cup'29, V,

- the'o pposite endofsaid springbearingagainst I asuitableabutment,therebeingshownforthe' purpose a disc 32 heldi-nf place by a milled cap 83 onshell 25. By turning the shell25 On the rear end' of body 10 of theouter I surface is atransve'rse series of indicating-rim merals and onthe shell: 25 'is a longitudinal.

to cause it to move outwardly or inwardly, the line '36 may begiven'aposition"alining' with any of the numeralsfon'the body l0.

T he pressure,'dependent'on the tensionof the i spring 31, 'will beindicated bythe' numerals isinlalinement to indicate the pressure. 5The] released air escaping through holes 34Q 3 5 will giveawhistlingsound, asthe '9 5 and cap 33Ycbnstitute'a whistle.

apredetern'iined pressure in a tire and it is unfailing :its" operationto signal when i l the predetermined pressure'has been reached-@100 Q areguilated. I 7 I i V y The described "construction serves to insure

